Sitting happily playing WoW this afternoon. Suddenly heard a tortured-plastic noise (like something cracking). Took me a few seconds to identify it as coming from the PC. Then noise gets louder, and suddenly the whole system powers down, accompanied by a burning electrical smell. Obviously unplugged everything immediately and opened up the case. Nothing really seemed to smell, apart from possibly the PSU - a Hiper, bought from here only a couple of months back. Computer will not turn on at all now - power switch on PSU does not light up when switched on. Does this sound like purely a PSU problem? I'm praying nothing else is damaged.